Home / 15,520.16-21,401.28-11,534.72

Finding the Fourth Proportional to 15,520.16, 21,401.28 and 11,534.72

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Solution

The fourth proportional to 15,520.16, 21,401.28 and 11,534.72 is: 15,905.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.16 : 21,401.28 = 11,534.72 : x
  2. Step 2: Convert to fraction form
    15,520.16/21,401.28 = 11,534.72/x
  3. Step 3: Cross multiply
    15,520.16x = 21,401.28 × 11,534.72
  4. Step 4: Simplify right side
    15,520.16x = 246,857,772.44
  5. Step 5: Solve for x
    x = 246,857,772.44/15,520.16
  6. Step 6: Final answer
    x = 15,905.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.